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A147241
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1101-0111-0010 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 57, 57, 413, 413, 5775, 5775, 129385, 129385, 3828429, 3828429, 165279073, 165279073
OFFSET
1,9
EXAMPLE
Maximal 9 X 9 example
.0.0.0.0.0.0.0.0.0
.0.0.1.0.0.0.1.0.0
.0.1.1.1.0.1.1.1.0
.1.1.0.1.0.1.0.1.1
.0.0.0.0.0.0.0.0.0
.1.1.0.1.0.1.0.1.1
.0.1.1.1.0.1.1.1.0
.0.0.1.0.0.0.1.0.0
.0.0.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A146785 A146572 A147211 * A146580 A146455 A146048
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved